1. Rijksuniversitair Centrum Antwerpen, Orofacial Morphology and Function, Groenenborgerlaan 171, 2020 Antwerp, Belgium
2. Katholieke Universiteit Leuven, Department of Operative Dentistry and Dental Materials, Kapucijnenvoer 7, 3000 Leuven, Belgium
3. ACTA, Universiteit van Amsterdam, Department of Clinical Materials Science, Louwesweg 1, 1066 EA Amsterdam, The Netherlands